Method for the creation of clearance holes

ABSTRACT

A method to join different materials through the creation of holes which allow entry of stay bolts is described. The method includes making slots on the plane of any material, the depth of these slots being equal to half the thickness of the plane, plus the length of the radius of the stay bolt or stud to be entered, plus a tolerance margin. The slots have a length as required by its end use and are made on two or more sides of the plane, in an alternate manner, so that the slot made on one side overlaps by a few millimeters the slot made on the opposite side creating a space for the passage of a stay bolt or stud that serves as the anchorage for the various pieces that make up an object to be realized.

TECHNICAL FIELD

This invention relates to a method to join together even differentmaterial through the creation of clearance holes allowing the entry ofstay bolts.

BACKGROUND OF ART

It is common knowledge that the creation of a number of objects quiteoften entails the recourse to junctions by means of tongue and groovejoint pins, eccentric joint pins, and L-shaped elements, made of metaland other materials, adhesives, and so on.

The solutions outlined above have been adopted worldwide since timeimmemorial, even though they are often inadequate from an aestheticpoint of view and, sometimes, they offer a poor resistance, particularlyto transverse stresses.

Besides, these solutions do not allow a great freedom of junction amongthe parts, particularly when one wants to join together parts withangles other than right angles.

FUNDAMENTALS OF INVENTION

The subject of this invention is a method to join together evendifferent materials through the creation of clearance holes allowing theentry of stay bolts.

According to this invention, slots are made on the plane of anymaterial. The depth of these slots is equal to half the thickness of theplane, plus the length of the radius of the stay bolt or stud to beentered, plus a tolerance margin.

The slots have the required length and are made on two or more sides ofthe plane, in an alternate manner, so that the slot made on one sideoverlaps by a few millimeters the slot made on the opposite side,creating in such a way the space for the passage of a stay bolt and studthat serves as the—anchorage for the various pieces that make up toobject to be realized.

Therefore, according to the method concisely described above, one maycreate seats of unlimited length for the passage of stay bolts or studs,while the thickness of the piece where the slots are made is determinedexclusively by the depth that the tool being used may reach.

The detailed description provided below may allow an improvedunderstanding of what has been briefly said until now by makingreference to the attached drawings, where:

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 shows the front view of a rectangular element worked according tothe method of this invention.

FIG. 2 shows a schematic view of how the slots are made on both sides ofthe part.

FIG. 3 shows a cross section of a slot made according to this invention.

FIG. 4 shows an axonometric view of a part worked according to thisinvention.

FIG. 5 shows a section axonometric of a part worked according to thisinvention.

FIG. 6 shows an axonometric view of a part worked on an angle accordingto this invention.

FIG. 7 shows a section axonometric of a part worked on an angleaccording to this invention.

FIG. 8 shows a side view of a bookcase realized with a part workedaccording to this invention.

FIG. 9 shows a front view of the bookcase referred to in FIG. 8.

FIG. 10 shows a front section view of the bookcase referred to in FIG.8.

FIG. 11 shows a top view of the bookcase referred to in FIG. 8.

DESCRIPTION OF INVENTION

With reference to these figures, the method for creating clearance holesaccording to this invention is based on the realization, on two or moresides of an element (1), for instance a wooden standard to be used in abookcase, of a series of slots (2) made alternatively in succession onside (3) and on the opposite side (4) of the element (1), along an axis,in such a way as to create a hole that is the result of the removal ofmaterial (3 a), taken off from side (3) and the removal of material (4a) taken off from the opposite side (4) (FIGS. 5-7). The clearance holehas a length as required and a diameter which is based on half thethickness of the part being worked, plus the radius of the stay bolt orcable, plus the tolerance of the materials that varies in relation tothe materials themselves.

The clearance hole(s) may be used in the assembly of the parts that makeup a piece of furniture such as, for instance, in the realization of abookcase for the passage of stay bolts that allow to make the side ofthe bookcase an integral part of the shelves, without having to resortto the traditional anchoring methods described above.

For instance, with reference to FIGS. 8, 9, 10, and 11, it may be easilyunderstood how the realization of the bookcase being shown is extremelysimplified by the presence along the standards (6) of the slots (2) thatallow the passage of the stay bolt (8).

The stay bolt (8) allows the various sections of the standards (6) toform an integral part supporting the shelves (9) and to reach therequired height even though, at least in the front part, nothing isvisible. Furthermore, the sturdiness of the system that is the subjectmatter of this invention is determined both by the fact that, being thestay bolts (8) accommodated inside the structure, they are protectedfrom any impact, and the fact that their position may not change bychance depending on the stresses and size of the structure.

Obviously, in order to see that the stay bolts (8) carry out theirfunction in the best possible manner, they shall be preferably providedwith threaded ends for screwing terminals (10) which are to allow theadjustment of the tension of the stay bolts (8), even in relation to thematerial used to realize the object or, at least, the structure, butalso in relation to the weight to be sustained and the use the object isintended for.

As previously pointed out. FIGS. 6 and 7 clearly show that a clearancehole may be created on an angle of the piece being worked, making slots(2) close to the angle always according to the arrangements describedabove.

In case of holes to be created in elements having a considerable width,for instance beams, the slots may be realized alternatively on each oneof the four sides in such a way as to ensure the continuity in thematerial being removed and, therefore, the creation of the hole for thepassage of the stud or reinforcement. A wooden beam for the falsework ofa roof may represent an example of such an application. It is clear thatthe possibility of creating clearance holes on the pieces to beassembled in order to accommodate cables or stay bolts of any type andmaterial allows the greatest possible freedom in the realization, doingaway with the design-related limitations that are currently imposed bythe customary means of aggregation and assembly such as shelves,adhesives, tongue and groove joint pins, and so on.

The recourse to the aforementioned method, for instance, makes it bothfeasible and easy to realize an orientation in the assembly of thestandard with respect to the plane of the shelf that is above or below90°, allowing in such a way the realization of bookcases or pieces offurniture where the design is not constrained by a right angle.

A further advantage that results from the application of theaforementioned method is that, being realizable on any material,including for instance Perspex, metal, wood and such artificialmaterials as plastics, it allows a joint to be made with no resultingproblem due to the different materials being used.

It is evident that even though a likely application of the method wassuggested with reference to the realization of a bookcase, this shouldnot be construed as a limitation to the likely fields of use of thismethod as it was merely provided as an example.

1. A method for creating clearance holes in a part being worked having afirst side and a second side which are either opposite or adjacent,comprising making a series of slots alternatively in succession andalong an axis on said first side and said second side of the part, onceon the first side and once on the second side of said part, in such away so as to create a continuity between material removed in providingthe slots on the first side and on the second side and, by removal ofthe material, the slots provide therein a clearance hole at a center ofthickness of the part in which the slots are made, wherein saidclearance hole allows for continuous passage of a stay bolt or cable,wherein the clearance hole has a length as required for said part, whiledepth of the slots is half of a thickness of the part being worked, plusa radius of the stay bolt or the cable, plus tolerance of respectivematerials, and varies in relation to the materials themselves.
 2. Themethod according to claim 1, wherein when slots are created on adjacentsides of the part, said clearance hole is located close to an angleprovided by the adjacent sides.
 3. The method according to claim 1,wherein each end of the stay bolt or the cable that acts as a stay boltand is accommodated within the clearance hole is threaded so that aterminal joining of parts crossed by the stay bolt or the cable may bescrewed on each side.
 4. The method according to claim 1, furthercomprising providing said slots in more than one part wherein each partis made of a different material, and each said part can be joinedtogether by said stay bolt or said cable.